The meaning of INFERNAL is of or relating to a nether world of the dead. How to use infernal in a sentence.

INFERNAL definition: hellish; fiendish; diabolical. See examples of infernal used in a sentence.

INFERNAL meaning: 1. very bad or unpleasant: 2. having the qualities of hell (= the place where some people believe…. Learn more.

Definition of infernal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. hellish; fiendish; diabolical: an infernal plot. 2. extremely troublesome, annoying, etc.; outrageous: an infernal nuisance. 3. of, inhabiting, or befitting hell or the underworld.

3 meanings: 1. of or relating to an underworld of the dead 2. deserving hell or befitting its occupants; diabolic; fiendish 3..... Click for more definitions.

Dec 24, 2025 · Adjective infernal (comparative more infernal, superlative most infernal) Of or relating to hell, or the world of the dead; hellish. (by extension) Of or relating to a fire or …

There are 11 meanings listed in OED's entry for the word infernal, three of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

WordReference Random House Learner's Dictionary of American English © 2025 in•fer•nal /ɪnˈfɜrnəl/ adj. fiendish; diabolical: an infernal plot. very troublesome; outrageous: an infernal …

always used before a noun 1 literary : of or relating to hell the infernal regions of the dead 2 informal + old-fashioned : very bad or unpleasant